Oh cool!
I wasn’t sure if this filter would work that way.
So, your saying run ducting from 1 of the exhaust holes already there, to the intake of the fan, then have the fan (Probably sitting on the outside behind the box, pushing the air through the filter, instead of sucking?
As long as this gets rid of the smell, that sounds pretty good!
the main thing is to use your filter on the exhaust side .Hammer
Got it!
I think I’m going to try hooking some ducting to the back of the box, and leaving all existing fans, ETC in place.
This new fan might be strong enough to suck enough CFM’s through it…
That way if it works, great, but if not, I can then go through the trouble of actually removing existing fans, ETC.
Sad thing is, I don’t have a nice flowering plant to do a good test with. 
lol
One thing at a time though.
Sounds like a plan ! …let us know how it works out ?
-best wishes